SOS

noun
\ ˌes-(ˌ)ō-ˈes How to pronounce SOS (audio) \

Definition of SOS

1 : an internationally recognized signal of distress in radio code ‧ ‧ ‧ - - - ‧ ‧ ‧ used especially by ships calling for help
2 : a call or request for help or rescue

First Known Use of SOS

1910, in the meaning defined at sense 1

Keep scrolling for more

Learn More about SOS

Statistics for SOS

Cite this Entry

“SOS.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/SOS. Accessed 22 Jan. 2021.

Keep scrolling for more

More Definitions for SOS

SOS

noun
How to pronounce SOS (audio)

English Language Learners Definition of SOS

: a signal used by ships and airplanes to call for help

SOS

noun
\ ˌes-ō-ˈes How to pronounce SOS (audio) \

Kids Definition of SOS

1 : an international radio code distress signal used especially by ships and airplanes calling for help
2 : a call for help

Medical Definition of SOS

if occasion require; if necessary used in writing prescriptions

History and Etymology for SOS

Latin si opus sit

More from Merriam-Webster on SOS

Nglish: Translation of SOS for Spanish Speakers

Comments on SOS

What made you want to look up SOS? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!